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Open data
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Basic information
Entry | Database: PDB / ID: 6tgc | ||||||||||||
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Title | CryoEM structure of the ternary DOCK2-ELMO1-RAC1 complex. | ||||||||||||
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![]() | SIGNALING PROTEIN / guanine nucleotide exchange factor / cytoskeleton / actin / cryoEM | ||||||||||||
Function / homology | ![]() membrane raft polarization / alpha-beta T cell proliferation / myeloid dendritic cell activation involved in immune response / establishment of T cell polarity / macropinocytosis / regulation of respiratory burst / negative regulation of interleukin-23 production / regulation of neutrophil migration / localization within membrane / Activated NTRK2 signals through CDK5 ...membrane raft polarization / alpha-beta T cell proliferation / myeloid dendritic cell activation involved in immune response / establishment of T cell polarity / macropinocytosis / regulation of respiratory burst / negative regulation of interleukin-23 production / regulation of neutrophil migration / localization within membrane / Activated NTRK2 signals through CDK5 / immunological synapse formation / negative regulation of receptor-mediated endocytosis / regulation of hydrogen peroxide metabolic process / ruffle assembly / engulfment of apoptotic cell / NTRK2 activates RAC1 / Inactivation of CDC42 and RAC1 / NADPH oxidase complex / negative thymic T cell selection / respiratory burst / WNT5:FZD7-mediated leishmania damping / guanyl-nucleotide exchange factor complex / SEMA3A-Plexin repulsion signaling by inhibiting Integrin adhesion / cortical cytoskeleton organization / hepatocyte growth factor receptor signaling pathway / myoblast fusion / ruffle organization / positive thymic T cell selection / thioesterase binding / cell projection assembly / regulation of stress fiber assembly / negative regulation of fibroblast migration / RHO GTPases activate CIT / sphingosine-1-phosphate receptor signaling pathway / Nef and signal transduction / motor neuron axon guidance / PCP/CE pathway / positive regulation of neutrophil chemotaxis / regulation of nitric oxide biosynthetic process / RHO GTPases activate KTN1 / Activation of RAC1 / regulation of lamellipodium assembly / Azathioprine ADME / MET activates RAP1 and RAC1 / DCC mediated attractive signaling / positive regulation of cell-substrate adhesion / regulation of small GTPase mediated signal transduction / Wnt signaling pathway, planar cell polarity pathway / Sema4D mediated inhibition of cell attachment and migration / CD28 dependent Vav1 pathway / Ephrin signaling / lamellipodium assembly / positive regulation of Rho protein signal transduction / establishment or maintenance of cell polarity / regulation of cell size / Activation of RAC1 downstream of NMDARs / small GTPase-mediated signal transduction / Rho GDP-dissociation inhibitor binding / phagocytosis, engulfment / NRAGE signals death through JNK / Rac protein signal transduction / RHO GTPases activate PAKs / positive regulation of focal adhesion assembly / semaphorin-plexin signaling pathway / Sema3A PAK dependent Axon repulsion / ficolin-1-rich granule membrane / RHOG GTPase cycle / RHOA GTPase cycle / RHO GTPases Activate NADPH Oxidases / EPH-ephrin mediated repulsion of cells / RAC2 GTPase cycle / RHO GTPases Activate WASPs and WAVEs / RHO GTPases activate IQGAPs / anatomical structure morphogenesis / PTK6 Regulates RHO GTPases, RAS GTPase and MAP kinases / T cell receptor binding / positive regulation of lamellipodium assembly / positive regulation of substrate adhesion-dependent cell spreading / positive regulation of phagocytosis / RHO GTPases activate PKNs / positive regulation of stress fiber assembly / GPVI-mediated activation cascade / positive regulation of microtubule polymerization / EPHB-mediated forward signaling / RAC1 GTPase cycle / regulation of cell migration / actin filament polymerization / positive regulation of endothelial cell migration / GTPase activator activity / substrate adhesion-dependent cell spreading / cell-matrix adhesion / small monomeric GTPase / cell chemotaxis / secretory granule membrane / G protein activity / VEGFR2 mediated vascular permeability / guanyl-nucleotide exchange factor activity / Signal transduction by L1 / Translocation of SLC2A4 (GLUT4) to the plasma membrane / actin filament organization Similarity search - Function | ||||||||||||
Biological species | ![]() | ||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.1 Å | ||||||||||||
![]() | Chang, L. / Yang, J. / Chang, J.H. / Zhang, Z. / Boland, A. / McLaughlin, S.H. / Abu-Thuraia, A. / Killoran, R.C. / Smith, M.J. / Cote, J.F. / Barford, D. | ||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Structure of the DOCK2-ELMO1 complex provides insights into regulation of the auto-inhibited state. Authors: Leifu Chang / Jing Yang / Chang Hwa Jo / Andreas Boland / Ziguo Zhang / Stephen H McLaughlin / Afnan Abu-Thuraia / Ryan C Killoran / Matthew J Smith / Jean-Francois Côté / David Barford / ![]() ![]() ![]() ![]() Abstract: DOCK (dedicator of cytokinesis) proteins are multidomain guanine nucleotide exchange factors (GEFs) for RHO GTPases that regulate intracellular actin dynamics. DOCK proteins share catalytic (DOCK) ...DOCK (dedicator of cytokinesis) proteins are multidomain guanine nucleotide exchange factors (GEFs) for RHO GTPases that regulate intracellular actin dynamics. DOCK proteins share catalytic (DOCK) and membrane-associated (DOCK) domains. The structurally-related DOCK1 and DOCK2 GEFs are specific for RAC, and require ELMO (engulfment and cell motility) proteins for function. The N-terminal RAS-binding domain (RBD) of ELMO (ELMO) interacts with RHOG to modulate DOCK1/2 activity. Here, we determine the cryo-EM structures of DOCK2-ELMO1 alone, and as a ternary complex with RAC1, together with the crystal structure of a RHOG-ELMO2 complex. The binary DOCK2-ELMO1 complex adopts a closed, auto-inhibited conformation. Relief of auto-inhibition to an active, open state, due to a conformational change of the ELMO1 subunit, exposes binding sites for RAC1 on DOCK2, and RHOG and BAI GPCRs on ELMO1. Our structure explains how up-stream effectors, including DOCK2 and ELMO1 phosphorylation, destabilise the auto-inhibited state to promote an active GEF. | ||||||||||||
History |
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Structure visualization
Movie |
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 852.1 KB | Display | ![]() |
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PDB format | ![]() | Display | ![]() | |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 10498MC ![]() 6tgbC ![]() 6ukaC M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
#1: Protein | Mass: 195902.516 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #2: Protein | Mass: 83891.328 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #3: Protein | Mass: 21478.113 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: Ternary complex of DOCK2-ELMO1-RAC1 / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT | |||||||||||||||
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Molecular weight | Value: 0.6 MDa / Experimental value: NO | |||||||||||||||
Source (natural) | Organism: ![]() | |||||||||||||||
Source (recombinant) | Organism: ![]() | |||||||||||||||
Buffer solution | pH: 8 | |||||||||||||||
Buffer component |
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Specimen | Conc.: 0.2 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | |||||||||||||||
Specimen support | Grid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3 | |||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK III / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD |
Image recording | Electron dose: 50 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
EM imaging optics | Energyfilter name: GIF Quantum ER / Energyfilter slit width: 20 eV |
Image scans | Movie frames/image: 20 |
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Processing
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EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||
3D reconstruction | Resolution: 4.1 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 245763 / Symmetry type: POINT | ||||||||||||||||||||||||
Refinement | Cross valid method: NONE Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||
Displacement parameters | Biso mean: 538.5 Å2 | ||||||||||||||||||||||||
Refine LS restraints |
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